OAKMX vs. OBSOX
Compare and contrast key facts about Oakmark Fund Investor Class (OAKMX) and Oberweis Small-Cap Opportunities Fund (OBSOX).
OAKMX is managed by Oakmark. It was launched on Aug 5, 1991. OBSOX is managed by Oberweis. It was launched on Sep 16, 1996.
Performance
OAKMX vs. OBSOX - Performance Comparison
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OAKMX vs. OBSOX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
OAKMX Oakmark Fund Investor Class | -2.47% | 14.13% | 16.02% | 30.92% | -13.38% | 34.85% | 12.90% | 27.14% | -12.76% | 21.12% |
OBSOX Oberweis Small-Cap Opportunities Fund | 3.71% | 14.28% | 16.13% | 15.81% | -11.17% | 43.39% | 32.52% | 25.06% | -7.05% | 25.55% |
Returns By Period
In the year-to-date period, OAKMX achieves a -2.47% return, which is significantly lower than OBSOX's 3.71% return. Over the past 10 years, OAKMX has underperformed OBSOX with an annualized return of 13.51%, while OBSOX has yielded a comparatively higher 15.91% annualized return.
OAKMX
- 1D
- 1.76%
- 1M
- -3.56%
- YTD
- -2.47%
- 6M
- 2.30%
- 1Y
- 10.13%
- 3Y*
- 16.07%
- 5Y*
- 10.98%
- 10Y*
- 13.51%
OBSOX
- 1D
- 4.21%
- 1M
- -7.67%
- YTD
- 3.71%
- 6M
- 7.36%
- 1Y
- 32.33%
- 3Y*
- 12.77%
- 5Y*
- 11.15%
- 10Y*
- 15.91%
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OAKMX vs. OBSOX - Expense Ratio Comparison
OAKMX has a 0.91% expense ratio, which is lower than OBSOX's 1.25% expense ratio.
Return for Risk
OAKMX vs. OBSOX — Risk / Return Rank
OAKMX
OBSOX
OAKMX vs. OBSOX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Oakmark Fund Investor Class (OAKMX) and Oberweis Small-Cap Opportunities Fund (OBSOX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
| OAKMX | OBSOX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.54 | 1.19 | -0.65 |
Sortino ratioReturn per unit of downside risk | 0.87 | 1.74 | -0.87 |
Omega ratioGain probability vs. loss probability | 1.13 | 1.24 | -0.11 |
Calmar ratioReturn relative to maximum drawdown | 0.82 | 2.13 | -1.31 |
Martin ratioReturn relative to average drawdown | 3.26 | 8.21 | -4.95 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| OAKMX | OBSOX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.54 | 1.19 | -0.65 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.60 | 0.45 | +0.15 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.66 | 0.65 | +0.01 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.71 | 0.30 | +0.41 |
Correlation
The correlation between OAKMX and OBSOX is 0.72, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.
Dividends
OAKMX vs. OBSOX - Dividend Comparison
OAKMX's dividend yield for the trailing twelve months is around 0.94%, while OBSOX has not paid dividends to shareholders.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
OAKMX Oakmark Fund Investor Class | 0.94% | 0.92% | 1.12% | 1.02% | 0.92% | 1.94% | 0.17% | 8.33% | 8.13% | 4.06% | 2.58% | 1.43% |
OBSOX Oberweis Small-Cap Opportunities Fund | 0.00% | 0.00% | 0.80% | 0.00% | 0.17% | 21.88% | 4.05% | 3.04% | 28.22% | 6.36% | 4.24% | 11.91% |
Drawdowns
OAKMX vs. OBSOX - Drawdown Comparison
The maximum OAKMX drawdown since its inception was -56.19%, smaller than the maximum OBSOX drawdown of -80.52%. Use the drawdown chart below to compare losses from any high point for OAKMX and OBSOX.
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Drawdown Indicators
| OAKMX | OBSOX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -56.19% | -80.52% | +24.33% |
Max Drawdown (1Y)Largest decline over 1 year | -13.46% | -13.92% | +0.46% |
Max Drawdown (5Y)Largest decline over 5 years | -23.68% | -28.65% | +4.97% |
Max Drawdown (10Y)Largest decline over 10 years | -41.43% | -42.79% | +1.36% |
Current DrawdownCurrent decline from peak | -4.97% | -7.67% | +2.70% |
Average DrawdownAverage peak-to-trough decline | -6.41% | -30.72% | +24.31% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.39% | 3.61% | -0.22% |
Volatility
OAKMX vs. OBSOX - Volatility Comparison
The current volatility for Oakmark Fund Investor Class (OAKMX) is 4.20%, while Oberweis Small-Cap Opportunities Fund (OBSOX) has a volatility of 12.06%. This indicates that OAKMX experiences smaller price fluctuations and is considered to be less risky than OBSOX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| OAKMX | OBSOX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.20% | 12.06% | -7.86% |
Volatility (6M)Calculated over the trailing 6-month period | 10.34% | 19.84% | -9.50% |
Volatility (1Y)Calculated over the trailing 1-year period | 18.77% | 28.47% | -9.70% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 18.35% | 24.83% | -6.48% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 20.43% | 24.53% | -4.10% |